Not everyone takes medicine, usually they review your numbers first, then see if diet and exercise can adjust your numbers. If not then they start with medicine. My first pregnancy I was already on metformin since prior to pregnancy then weaned off at 30 weeks for other reasons but numbers reminded fine through diet and exercise for the remainderof my pregnancy. This pregnancy I have required bedtime insulin from 6 weeks pregnant for my fasting numbers but my meal number have been balanced by diet.
Have you been given insulin have they not tried you on metformin first. Also insulin you usually take 15 mins before food x